CN1836066A - Needle bar driving device of sewing machine - Google Patents

Needle bar driving device of sewing machine Download PDF

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Publication number
CN1836066A
CN1836066A CNA200480023575XA CN200480023575A CN1836066A CN 1836066 A CN1836066 A CN 1836066A CN A200480023575X A CNA200480023575X A CN A200480023575XA CN 200480023575 A CN200480023575 A CN 200480023575A CN 1836066 A CN1836066 A CN 1836066A
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CN
China
Prior art keywords
shank
needle bar
sewing machine
drive
moving member
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA200480023575XA
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Chinese (zh)
Inventor
田岛郁夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokai Kogyo Sewing Machine Co Ltd
Original Assignee
Tokai Kogyo Sewing Machine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokai Kogyo Sewing Machine Co Ltd filed Critical Tokai Kogyo Sewing Machine Co Ltd
Publication of CN1836066A publication Critical patent/CN1836066A/en
Pending legal-status Critical Current

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    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05CEMBROIDERING; TUFTING
    • D05C11/00Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/02Machine needles
    • D05C11/06Needle-driving or control mechanisms
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B55/00Needle holders; Needle bars
    • D05B55/14Needle-bar drives

Abstract

A needle bar drive apparatus for a sewing machine includes a dedicated drive source (16) for driving a needle bar (3) of the sewing machine to move up and down. When a sewing operation is to be performed, a control section (160) controls the drive source to cause the needle bar to move up and down within a predetermined stroke range, but, when no sewing operation is to be performed, the control section controls the drive source to cause the needle bar to retreat to a predetermined evacuation position set above a top dead center in the predetermined stroke range. The control section is also capable of varying a timewise pattern of the upward and downward movement of the needle bar within the predetermined stroke range. Thus, it is possible to secure an increased space between the lower end of the needle bar and the upper surface of a sewing machine table during a non-sewing period while limiting the stroke of the needle bar to a necessary minimum during a sewing period. Also, timing for driving the needle bar can be varied freely.

Description

The sewing machine needle bar drive unit
Technical field
The present invention relates to the sewing machine needle bar drive unit, particularly, relate to a kind of like this sewing machine needle bar drive unit, it utilizes easy mechanism that shank is driven, and the change of the driving timing of shank is carried out easily, and the stroke of the shank in the time of can will make makes necessary Min., and make can make when stopping the stroke top dead-centre of shank when making above keep out of the way.
Background technology
As an example of known in the past sewing machine needle bar drive unit, in following patent documentation 1, disclosed embroidery machine with the needle bar drive device that utilizes linear motor.In the conventional art, disclosed: on each (sewing machine head) of bull formula embroidery machine, be respectively equipped with the linear motor that shank is driven usefulness, and be provided with the checkout gear that the anglec of rotation to the shuttle axle detects, described shuttle axle is rotated the shuttle that has on each, with synchronously the action of this linear motor is controlled by the anglec of rotation of the detected shuttle axle of checkout gear, utilize this structure, just do not need to drive the Poewr transmission mechanism of the complexity of cam mechanism that shank uses etc., can make simplifying the structure of needle bar drive device, and suitably control by the action to this linear motor, can freely set the driving timing of shank according to the change of making style etc.
The special fair 3-37960 communique of [patent documentation 1] Japan Patent
In the structure of described patent documentation 1, the fixed amplitude that makes shank carry out the stroke of lifting driving when making becomes certain, and the top dead-centre of the trip is set at the position of regulation, makes to vacate than big distance with the interval of sewing machine table upper surface.This be because, the lower end that must be by guaranteeing the shank on the stroke upper dead center position suitable fully and the interval of sewing machine table upper surface with the position of this regulation, for example make when replacement is configured in the operation of the sewn object (cloth) on the sewing machine table trouble that can not cause that the lower end of shank contacts with this cloth etc.That is, the stroke amplitude that the described lifting of shank drives must be set the big stroke amplitude of stroke amplitude than bottom line necessity when making for.Like this, in the structure of described patent documentation 1,, exist noise and vibration when making to become big unfavorable condition owing to shank is driven with big stroke amplitude.Again, owing to be fixed into necessarily with the stroke amplitude of described big stroke amplitude with shank, the free degree of the driving timing of shank setting also is restricted.Again, on the other hand, along with the variation of embroidering work, guaranteed as far as possible significantly in advance in the shank lower end of (when being driven) and the space of worktable upper surface when also requirement will be stopped.
Summary of the invention
The present invention, make in view of the above problems, its purpose is, a kind of like this sewing machine needle bar drive unit is provided, can make the stroke of the shank when making action make necessary Min., and the shank lower end of when driving (non-) and the space of worktable upper surface can guarantee to stop the time, and can freely and easily carry out the change of the driving timing of shank biglyyer.
Sewing machine needle bar drive unit of the present invention is characterized in that having: sewing machine needle bar is carried out the special-purpose drive source that lifting drives usefulness; Make the action of when action with this drive source be controlled to make described shank in the prescribed stroke scope, carry out elevating movement, action with this drive source when not making action is controlled to the control device that makes described shank move to the retreating position of regulation, the top dead-centre that described retreating position is set at more described prescribed stroke scope is the top more.
Thus, drive source to be set in order only shank being driven,, when making action, to make shank in the prescribed stroke scope, carry out lifting and drive by utilizing the control of control device to this drive source.And do not making when action, just can make shank move to the retreating position of regulation, the top dead-centre that described retreating position is set at more described prescribed stroke scope more above.Thus, when not making action, owing to can make shank keep out of the way and the lower end of shank and the space of sewing machine table upper surface can be obtained enough greatly, so for example can prevent when the operation of carrying out sewn object replacement such as cloth etc., situation that the lower end of shank contacts with sewn object to described retreating position.Again, like this, by in addition retreating position being set in the top of making stroke range, just can guarantee fully that the lower end of shank and the space of sewing machine table upper surface, the described prescribed stroke scope of the shank in the time of also will making are limited in the required minimal amplitude of making.Therefore, because the stroke amplitude of shank that can be when making reduces, so can reduce noise and vibration when making.In addition, it is variable to make the time diagram of the elevating movement that makes the described shank in described prescribed stroke scope.Thus, can be to making style adjustment.Here, because the stroke amplitude when this needle bar driving device made makes necessary Min., thus can increase the free degree of the driving timing setting of shank, can be diversely to making style adjustment.
Description of drawings
Fig. 1 is the front view of the multi-handpiece sewing machine of one embodiment of the invention.
Fig. 2 is the side sectional view of the sewing machine head of Sewing machines shown in Figure 1.
Fig. 3 is a stereogram of the major part of screw mandrel and peripheral mechanism thereof being extracted out expression in the sewing machine head of Fig. 2.
Fig. 4 is a vertical view of seeing the major part of screw mandrel shown in Fig. 3 and peripheral mechanism thereof from the top, and expression is with respect to the mounting structure of the drive motor of support arm.
Fig. 5 is a front section view of seeing Fig. 4 from the sewing machine head front face side.
Fig. 6 is the side sectional view of the sewing machine head of this embodiment, and the expression shank is positioned at the state of stroke top dead-centre.
Fig. 7 is the side sectional view of the sewing machine head of this embodiment, and the expression shank is positioned at the state of bottom of stroke.
Fig. 8 (a) is the control system figure of shank drive motor, (b) is the action curve map regularly of the shank of this embodiment of expression.
Fig. 9 is the side sectional view of sewing machine head, another structure example of expression needle bar drive device.
Figure 10 is the side sectional view of sewing machine head, the another structure example of expression needle bar drive device.
The specific embodiment
Below, with reference to accompanying drawing one embodiment of the invention are described.
Fig. 1 represents the front view of the bull formula embroidery machine of this embodiment.On the Sewing machines framework M of the formation general frame of this bull formula embroidery machine, be equipped with a plurality of (among the figure being 6) sewing machine head H.Each sewing machine head H, by be fixed on the Sewing machines framework M support arm 1 and on this support arm 1 to the left and right the shank shell 2 that is supported slidably of direction constitute, but a plurality of (among the figure being 9) shank 3 of knee-action is being set in this shank shell 2.Below each sewing machine head H, be provided with shuttle 4 and the shuttle seat 5 that supports this shuttle 4 respectively accordingly with each sewing machine head H.Though not shown, the rotation that utilizes machine spindle is rotated shuttle 4 and drives and be provided with the encoder that the anglec of rotation to shuttle 4 detects on machine spindle.Again, workbench 6, on the upper surface of this workbench 6, be provided with and launched to keep the embroidery tambour 7 of usefulness by the embroidery thing at Sewing machines framework M upper support.This embroidery tambour 7 constitutes and utilizes not shown driving mechanism, direction is driven relative sewing machine head H all around.
Fig. 2 represents the side sectional view of 1 sewing machine head H.Support arm 1 is adapted to the state that extends to Sewing machines front face side (being the left side the figure) from Sewing machines framework M, and shank shell 2 is configured to the state with the front face side of support arm 1 and upper face side covering.In this shank shell 2, accommodating the Poewr transmission mechanism that drives shank 3 usefulness and other is in order to realize the necessary various mechanical components of embroidery action.As can be seen from Figure 2, the leading section of support arm 1 forms roughly コ font (promptly having the upper and lower end parts of mutual almost parallel and the shape of the side wall portion that links to each other with this upper and lower end parts), rotatably is supported on this support arm 1 as the screw mandrel 8 of one of primary structure member of the mechanism that drives shank 3 usefulness.This screw mandrel 8, being provided with on its side face with the axle is the thread that central helical ground forms, and generally perpendicularly is configured in the described upper and lower end parts of support arm 1.The lower end of screw mandrel 8 is supported in by bearing 9 on the bottom of support arm 1, and again, the upper portion of screw mandrel 8 is supported in the bearing components 10 of the upper end of being fixed in support arm 1 by bearing 11.In the upper portion of screw mandrel 8, be formed with the 8a of restriction portion of hole enlargement coaxially with screw mandrel 8, and it is configured in the following side of described bearing components 10 again.Again, in the upper portion of screw mandrel 8, at the upper face side of this bearing components 10,2 nut members 12 are screwing togather with this screw mandrel 8.By utilizing this 8a of restriction portion and 2 nut members 12 that bearing components 10 (bearing 11) is sandwiched, the upper-lower position relative with support arm 1 of screw mandrel 8 is limited.In addition, packing ring 13 is provided between nut member 12 and bearing components 10 upper surfaces.
In the upper end of screw mandrel 8, fixing belt pulley 14 coaxially with the axle of screw mandrel 8, belt pulley 14 and screw mandrel 8 are that the center rotates integratedly with this axle.As can be seen from Figure 2, belt pulley 14 and the nut member 12 that is arranged on the upper end side of screw mandrel 8 given prominence to from the upper side of support arm 1.Fig. 3 is by with the shank shell and be installed in the partial cross-sectional perspective view that various mechanical components on the shank shell 2 are removed, only the major part of screw mandrel 8 and peripheral mechanism thereof extracted out expression from the sewing machine head of Fig. 2.In the upper end of screw mandrel 8, fixing belt pulley 14 coaxially with the axle of screw mandrel 8, belt pulley 14 and screw mandrel 8 are that the center rotates integratedly with described axle.Volume is hung belt 15 on the lateral circle surface of belt pulley 14, and this belt 15 is used for following shank is driven the rotation driving of special-purpose motor 16 up and down to belt pulley 14 transmission.Fig. 4 is a vertical view of seeing the major part shown in Fig. 3 from above, represents the mounting structure of described motor 16.Again, Fig. 5 is a fragmentary sectional elevation view of seeing Fig. 4 from the front of Sewing machines.As shown in Figure 4 and Figure 5, drive motor 16 correspondingly with this screw mandrel 8 respectively is being provided with (being that each sewing machine head H is provided with 1), is fixed on the support arm 1 by base component 16a.Drive motor 16, its rotating shaft 16b are adapted to parallel with the axle of screw mandrel 8, are fixed with drive pulley 17 in the upper end of this rotating shaft 16b.By belt 15 volumes are hung on belt pulley 14 and the drive pulley 17, belt pulley 14 is being connected linkedly with drive pulley 17 by belt 15.Thus, when drive motor 16 was driven, its rotation was transmitted to belt pulley 14 by belt 15.Therefore, when the driving that utilizes drive motor 16 made belt pulley 14 rotation, making screw mandrel 8 linkedly with the rotation of this belt pulley 14 was that the center is rotated with the axle.
Screw mandrel 8 upper edge screw mandrels 8 axially, can set moving member 18 up or down as one of primary structure member that drives shank 3 usefulness mechanisms.Moving member 18 constitutes the general cylindrical shape shape as a whole, has the through hole (not shown) that allows screw mandrel 8 to connect along the axis of this moving member 18 in its approximate centre.Moving member 18 is screwing togather at this through hole and screw mandrel 8.That is, part or all of the inner peripheral surface of this through hole of moving member 18 form be located at screw mandrel 8 peripheries on the screwed hole (negative thread) that cooperates of thread (pin thread).Thus, the energy of rotation of this screw mandrel 8 transmits to moving member 18.Again, the regulation position on the preceding side face of moving member 18 is formed with the 1st forwards outstanding engaging tab 18a, and the regulation position on the side face of back is formed with the recessed 18b of engaging that rearward extends.Fixing the 2nd engaging tab 19 in the lower portion that is separated with predetermined distance from the 1st engaging tab 18a, these the 1st engaging tab 18a and the 2nd engaging tab 19, to be described in detail in the back, play function as the connecting elements that moves up and down the machinery that interlock uses that makes shank 3 and moving member 8.Engage recessed 18b and on regulation position, rear end, have slot part (switch-in part).On support arm 1, with the axle of screw mandrel 8 be provided with abreast should with the card stopping bar 20 of the described slot part engaging that engages recessed 18b.Chimeric by blocking stopping bar 20 with this slot part that engages recessed 18b, be that the rotation at center is limited to moving member 18 with axle (screw mandrel 8).
By the driving of motor 16,, on moving member 18, acting on its revolving force when screw mandrel 8 is center when being rotated with the axle.Moving member 18 is not owing to because of card stopping bar 20 is limited with engaging the chimeric of recessed 18b, be rotated so can not follow the rotation of screw mandrel 8.Therefore, the moving member 18 that screws togather with screw mandrel 8 when screw mandrel 8 is the center rotation with the axle, utilizes the threaded function that is located at the thread around the screw mandrel 8, and just the axial above-below direction along screw mandrel 8 moves.By the direction of rotation of motor 16 is switched positive and negatively, moving member 18 is moved upper and lower, back and forth.Moving member 18 below in Fig. 5, representing to be indexed to double dot dash line.
In the front upper of support arm 1, disposing and seeing the shank shell 2 direction vertical direction of paper (the Fig. 2 with respect to) line slideway 21 of supporting slidably to the left and right from the Sewing machines front.On the back side, bottom of shank shell 2, fixing the guide rail 22 that extends abreast with this line slideway 21, and be provided with rotatable roller 23 and ways 24 in support arm 1 side, by roller 23 and ways 24 this guide rail 22 is sandwiched, when sliding, the lower end side of shank shell 2 just is the state that is directed to.
A plurality of (in this example being 9) shank 3 can be supported respectively in shank shell 2 up or down.In the bottom of each shank 3, have respectively by 25 suture needles that clip 26 of pin folder.Again, fixing shank folder 27 respectively, the prominent engagement pin 28 of establishing at the back side of these each shank folders 27 at the roughly pars intermedia of each shank 3.This engagement pin 28, by be located at moving member 18 on the 1st engage tab 18a and the 2nd engaging tab 19 engaging, play as the function that moves up and down the member that interlock uses that makes shank 3 and this moving member 18.The engagement pin 28 that has on certain 1 (in front of being presented among the figure) shank 3 of expression among Fig. 2 engage tab 18a and the 2nd and engages the state that tab 19 engages with the 1st.As shown in the figure, engagement pin 28 is by engaging with the 2nd between the tab 19 at the 1st engaging tab 18a, by two members from sandwiching up and down.Therefore, this shank 3 is owing to be connected with moving member 18 with engagement pin 28, so when moving member 18 when direction moves up and down, just up and down reciprocatingly driven with moving up and down linkedly of this moving member 18.Expression engages the section of the engagement pin 28 between the tab 19 among Fig. 5 with the 2nd at the 1st engaging tab 18a.The interval that the 1st engaging tab 18a engages with the 2nd between the tab 19 makes with the height of engagement pin 28 roughly equal, as long as it is just passable to guarantee that at least engagement pin 28 can engage between the tab 19 interval that enters/deviate from respect to the 1st engaging tab 18a from left and right directions with the 2nd, preferably, reduce engagement pin 28 becoming flexible as far as possible at the above-below direction when the 1st engaging tab 18a engages between the tab 19 with the 2nd.
The selection of (promptly driven) shank 3 that is connected with moving member 18 utilizes not shown color replacing mechanism to carry out.Promptly, when utilizing this color replacing mechanism to make shank shell 2 when direction moves to the left and right, according to the sliding position pair shank 3 that is connected with moving member 18 of shank shell 2, promptly the described engagement pin 28 that engages with the 2nd between the tab 19 at the 1st engaging tab 18a is switched.Like this, the sliding position according to shank shell 2 can switch by corresponding any 1 shank 3 that drives from a plurality of (9) shank 3 selectively.Here, non-selected shank 3 is stayed the retreating position of regulation described below, is maintained at this retreating position till being selected by color replacing mechanism.
Upside at the shank of each shank 3 folder 27 is being fixed top dead-centre block 29, is setting buffer 32 on the upper surface of this top dead-centre block 29.Again, be provided with spring base 30, between the crossbearer 2a of this spring base 30 and shank shell 2 upper surface, be provided with coaxially to making this shank 3 keep spring 31 to the shank of the direction application of force that rises all the time with shank 3 in the upper end of each shank 3.Each shank 3 of being selected by described color replacing mechanism not, utilize elastic force that this shank keeps spring 31 all the time by the application of force upward, as shown in Figure 2, the top dead-centre block 29 of this shank 3 is positioned at position by buffer 32 butt below described crossbearer 2a (top dead-centre during non-selection of shank 3).Holding position (top dead-centre during non-selection) with so non-selected shank 3 is called " retreating position " in this manual.This retreating position is defined in the more top of the lifting travel scope of shank 3.
In addition, have fabric clamp 33 in the lower end side of each shank 3 respectively with described suture needle 26, it is followed corresponding moving up and down of shank 3 and moves back and forth up and down.Again, the symbol 44 of Fig. 2 is the known needle plates that are fixed on the upper surface of shuttle seat 5.Fabric clamp 33 is with about the driving up and down of corresponding shank 3 is carried out linkedly, and in shank 3 back (when thing is embroidered in suture needle 26 break-through) that descends downwards, this fabric clamp 33 will be by the embroidery thing by being pressed on the shank 44 thus.
In the upper portion of shank shell 2, between the face of the left and right sides of this shank shell 2, cantilever support axle 34 along glide direction (left and right directions) crossbearer of shell.To be installed in swingably respectively on this cantilever support axle 34 with each corresponding a plurality of (being 9 in this example) cantilever 35 of a plurality of shanks 3.Each cantilever 35 as shown in Figure 2, is configured to its leading section from front face side (left side Fig. 2) the outstanding state of shank shell 2 to Sewing machines.Cantilever 35 on the lug boss 36 that is arranged at its base end part (rearward end), is installed on this cantilever support axle 34.On this lug boss 36, the regulation position of the side face of side is formed with embeded slot 36a in the wings, chimeric the leading section of drive rod 41 described later in this embeded slot 36a.Again, be formed with engaging recessed part 36b on the regulation position of the place ahead of lug boss 36 side face, it can engage with the pawl 38a that engages of securing rod 38 described later.
Again, in shank shell 2,, supporting bolster 37 abreast, but corresponding with each cantilever 35 respectively and 9 securing rod 38 free swaying ground supportings having are on this bolster 37 with this cantilever support axle 34 in the location haply of cantilever support axle 34.Securing rod 38 is provided with engaging pawl 38a at its free end (swinging end).Torque spring 39 at the base end part of each securing rod 38 along the periphery setting-in of the installing hole of bolster 37 again.Torque spring 39, the body card of the end of one side and securing rod 38 ends, and the opposing party's end is hooked on the bar 39a that is provided with abreast with bolster 37.By this torque spring 39 with securing rod 38 application of force swingingly counterclockwise in Fig. 2, the engaging pawl 38b of each securing rod 38 can with the engaging recessed part 36b engaging of corresponding lug boss 36.(when the shank 3 of correspondence is non-selection) under normal conditions, the engaging pawl 38a of this securing rod 38 and the engaging recessed part 36b of lug boss 36 are chimeric, with prescribed form (upper dead center position) cantilever 35 are held in non-oscillatory state (lock-out state).
Above support arm 1, stipulate the position, be provided with the drive motor 40 (dotting among Fig. 2) that drives cantilever 35 usefulness.Drive rod 41 is being connected with the motor reel 40a of drive motor 40, and the driving of this drive rod 41 and drive motor 40 is correspondingly by wobble drive.When the shank 3 of correspondence had been selected by described color replacing mechanism, the lug boss 36 of cantilever 35 was positioned at the place ahead of drive rod 41, and the leading section of drive rod 41 is with chimeric corresponding to the embeded slot 36a on the lug boss 36 of the cantilever 35 of this selecteed shank 3.Thus, become the state that the wobble drive of drive rod 41 is transmitted to this cantilever 35.As shown in Figure 2, under this state, on this cantilever 35, owing to be disengaged, so this cantilever 35 just swings up and down linkedly with the wobble drive of drive rod 41 with the lock-out state of the cantilever 35 of securing rod 38 generations.To narrate below for the mechanism that this latch-release is used.
With the assigned position of roller 43 free rotary ground supportings at the leading section of the pedestal 42 of fixing drive motor 40, this roller 43 just with the jut 38b butt of the rear end that is located at securing rod 38, the selected shank of described securing rod 38 and color replacing mechanism 3 is corresponding.The securing rod 38 corresponding with selected shank 3, overcomes the application of force of torque spring 39 and is that fulcrum is rotated displacement to clockwise direction with bolster 37 with jut 38b butt and moving by thruster forwards by roller 3.To clockwise rotation displacement, as shown in Figure 2, the engaging pawl 38a of securing rod 38 deviates from from the engaging recessed part 36b of lug boss 36 by securing rod 38.Like this, (the maintenance prescribed form) state that in the selected cantilever 35 by color replacing mechanism, will lock is removed.Thus, as long as drive motor 40 is driven, just make cantilever 35 swings corresponding with selected shank 3.
Then, with reference to the side sectional view of Fig. 6 and sewing machine head H shown in Figure 7 and the control system figure shown in Fig. 8 (a) drive actions of the shank 3 of present embodiment is described.As previously mentioned, Fig. 2 represent with shank 3 remain on be prescribed be positioned at the driving stroke range when making top dead-centre (making the stroke top dead-centre) more the top the state of retreating position.At this moment, drive motor 16 should make shank 3 keep out of the way to this retreating position, and moving member 18 is controlled to the top dead-centre (top dead-centre of screw mandrel 8) of the moving range that is positioned at the moving member 18 suitable with the retreating position of shank 3 by action.Promptly, for driving, the rotation to drive motor 16 controls, as Fig. 8 (a) roughly shown in, be provided with the detector 16s and the control part 160 that the position of rotation of motor 16 or rotation amount or rotating speed are detected usefulness, when giving the retreating position indication, utilize 160 pairs of motor 16 of control part to be rotated drive controlling to the direction that moving member 18 is risen, then, according to the detection of detector 16s output, be controlled to the state that this moving member 18 top dead center suitable with the shank retreating position stops that being rotated in that makes motor.Like this, in that moving member 18 rotation on the direction that moves above the ormal weight is driven until suitable with the shank retreating position after top dead center, stop the rotation in this position.Thus, the selected shank 3 of color replacing mechanism also similarly is positioned at retreating position with unselected shank 3 now.Like this, when all shanks 3 that comprise present selected shank 3 are positioned at retreating position, because the height and position of the engagement pin 28 of all shanks 3 is consistent with the height and position that the 1st engaging tab 18a of moving member 18 sides engages between the tab 19 with the 2nd, so can utilize color replacing mechanism that shank shell 2 is slided, and can select shank 3 arbitrarily.For example, when replacing sewn object etc., be controlled to and make shank 3 be positioned at this retreating position.Thus and since can will be positioned at the interval of upper surface of the lower end of shank 3 of retreating position and workbench 6 obtain bigger, so carry out this replacement operation easily.
Fig. 6 represents that selected shank 3 is positioned at the state of the top dead-centre of the stroke of making up and down (stroke upper dead center position).After above-mentioned retreating position is selected arbitrarily shank 3, before embroidery begins soon,, make moving member 18 drop to prescribed stroke upper dead center position shown in Figure 6 by drive motor 16 being driven and makes screw mandrel 8 rotation ormal weights.Thus, selected shank 3 is followed the decline of moving member 18 and is dropped to the top dead-centre of stroke up and down.Promptly, in Fig. 8 (a), 160 pairs of motor 16 of control part are rotated drive controlling to the direction that moving member 18 is descended, when according to the detection of detector 16s output, detect this moving member 18 when having arrived the predetermined stroke upper dead center position, can be controlled at the trip upper dead center position the rotation of motor is temporarily stopped.In addition, the upper dead center position (stroke upper dead center position) in the stroke range of the shank 3 shown in here can be according at random set change by the thickness of embroidery thing etc.For example, as long as the user can at random be set the position of making the stroke top dead-centre, by the comparison to the detection output of detector 16s and stroke upper dead center position setting value, just the situation of the stroke top dead-centre that can set arrival is judged just.
Fig. 7 represents that selected shank 3 is positioned at the state (lower dead point position) of bottom-end of stroke up and down.When beginning along with embroidery, giving to make the stroke indication, in main axis rotation timing based on machine spindle anglec of rotation data, utilize control part 160, by drive motor 16 is carried out drive controlling to positive rotation, make screw mandrel 8 to positive direction rotation ormal weight, make moving member 18 and shank 3 drop to bottom dead centre shown in Figure 7.In the bottom dead centre of Fig. 7, fabric clamp 33 card is ended on needle plate 44, suture needle 26 is inserted in the hole on the needle plate 44, run through not shown by the embroidery thing.When moving member 18 and shank 3 drop to bottom dead centre, control part 160 is according to the detection output of detector 16s, this moving member 18 arrived to the situation of prescribed stroke lower dead point position judge, the rotation of motor is temporarily stopped, then, by drive motor 16 is carried out the despining drive controlling, thereby make screw mandrel 8, make moving member 18 and shank 3 rise to the top dead-centre of Fig. 6 to the opposite spin ormal weight.When making moving member 18 and shank 3 rise to the stroke top dead-centre, control part 160 arrives to the situation of prescribed stroke upper dead center position according to the detection output of detector 16s, to this moving member 18 to be judged, the motor rotation is temporarily stopped.Make the stroke indication if also give, then,, make moving member 18 and shank 3 drop to the bottom dead centre of Fig. 7 by once more drive motor 16 being carried out the positive rotation drive controlling.Like this, by drive motor 16 is driven ormal weight to each rotation of positive and negative two directions, moving member 18 and shank 3 carry out lifting in the stroke range up and down of regulation (from the upper dead center position of Fig. 6 between the lower dead point position of Fig. 7).Thus, suture needle 26 can be embroidered up and down drivingly.Like this, when embroidering work, in Fig. 6 and shown in Figure 7 driving to making shank 3 carry out lifting between the lower dead point position from upper dead center position, when utilizing color replacing mechanism to carry out the switching of shank 3 and when the transposing of the thing of being embroidered after finishing of embroidering, moving member 18 and shank 3 are risen to retreating position shown in Figure 2.Adopt present embodiment, because can make shank 3 as required keeps out of the way to retreating position, set so can not consider to make the lower end of shank 3 to obtain broad and the lifting of shank 3 is driven stroke range, so the trip scope can be defined as and make required Min. with the interval of the upper surface of workbench 6 for convenient grade of replacing operation.
In addition, in this manual for convenience, to make moving member 18 and shank 3 carry out direction of rotation that descending motion uses as positive direction, to make moving member 18 and shank 3 carry out direction of rotation that ascending motion uses on the contrary as in the other direction, but also arbitrarily direction of rotation be called positive direction or opposite direction.
Again, detector 16s, be not limited to type that the position of rotation of motor 16 or rotation amount or rotating speed are directly detected, also can use contactless or contact ground that the physical location of moving member 18 or shank 3 is arrived any detector such as type that the situation of above-mentioned retreating position and stroke top dead-centre, bottom of stroke detects.
Again, control part 160 both can constitute with special-purpose hardware unit, or also can constitute with the combination with the software program that constitutes in order to control as described above of CPU or the such general purpose control device of microcomputer.
Fig. 8 (b) is the action curve map regularly of expression shank 3.In the figure, represent the anglec of rotation of machine spindle (shuttle 4) on the transverse axis, the travel position of expression shank 3 on the longitudinal axis.Make the drive controlling timing of the drive motor 16 of shank 3 liftings, as known in the art, control according to the anglec of rotation of machine spindle (shuttle 4).That is, respectively making and in the stroke drive motor 16 is carried out the timing of drive controlling, is synchronously to carry out with rotatablely moving of shuttle 4 according to the output signal (anglec of rotation data of machine spindle or shuttle) of the encoder that detects from the anglec of rotation to shuttle 4.In Fig. 8 (b), solid line is represented the basic action timing (time diagram that lifting drives) of shank 3, this basic action regularly with the corresponding relation of the anglec of rotation of shuttle 4, from figure as can be known, when the main axis rotation angle is 180 °, the situation that arrives lower dead point position (with reference to Fig. 7) with shank 3 is that benchmark carries out drive controlling, becomes 180 ° the moment, the direction of rotation of drive motor 16 is reversed from the anglec of rotation of main shaft, makes shank 3 rise to upper dead center position (with reference to Fig. 6).In Fig. 8 (b), if will be from the bottom of stroke position to the movably gamut of shank retreating position as this shank 3 (and moving member 18), then the stroke range (amplitude from the stroke upper dead center position to lower dead point position) during the making of shank 3 can be limited to necessary Min. the described gamut.
The change of the time diagram that the lifting of shank 3 drives, for example Fig. 8 (b) is middle with shown in the double dot dash line, can be controlled to from the timing of the elemental motion shown in the solid line by the action with drive motor 16, make the relative main axis rotation angle postponement of decline timing of shank 3 and the relative main axis rotation angle of its timing of rising is realized in advance.Thus, just can with embroidery is carried out pine make or the change of tight " the making style " of making usefulness corresponding.In addition, if the action of adopting the shank 3 shown in the double dot dash line of Fig. 8 (b) is regularly, then can be, be that the time t1 that suture needle 26 is arranged in the top of needle plate 44 (being expressed as the needle plate position at Fig. 8 (b)) makes than longer with the time t2 of the basic timing shown in the solid line with shank 3.The driving (with reference to Fig. 1) of the left and right directions forwards, backwards of embroidery tambour 7, suture needle 26 be positioned at needle plate 44 above the time carry out (suture needle 26 be positioned at needle plate 44 below the time, this suture needle 26 thrust in by embroidery cloth).Therefore, by should time t1 obtain longer, the amount of movement that just making can be elongated to the time that embroidery tambour drives, can guarantee embroidery tambour as much as possible.
Again, make the driving of drive motor 16 stop certain hour and the rotation of screw mandrel 8 is temporarily stopped, by such control, shown in dashed lines p among Fig. 8 (b), can make the driving of shank 3 stop 1 stroke part, can carry out make a leapleap forward (the skipping) of 1 pin part, embroidery tambour is moved more.Again, by the drive amount of motor 16 is controlled changeably, in Fig. 8 (b), shown in chain-dotted line, the upper dead center position of the lifting travel of shank 3 can be changed to also that top more (rising after representing to increase with S1 among Fig. 8 (b) is moved, represented common top dead-centre with S2) is waited, the position of the stroke top dead-centre of shank 3 can freely set/change according to the sewing condition of the thickness of the thing of being embroidered etc.
As mentioned above, adopt present embodiment, drive owing to make, so do not need in the past to make simplifying the structure of needle bar drive device in order to drive the Poewr transmission mechanism of the required complexity such as cam mechanism of shank 3 with screw mandrel 8 with 18 pairs of shanks 3 of moving member that screw mandrel 8 screws togather.Again, adopt present embodiment, can make shank 3 carry out lifting with Fig. 6 and necessary minimal stroke shown in Figure 7 when embroidery drives, and when non-select or during the operation of the replacement of cloth etc., shank 3 is kept out of the way to retreating position shown in Figure 2, therefore noise and vibration in the time of can not only reducing embroidery can also further increase the setting of lifting timing, the free degree of change.In addition, when the operation of the replacement of cloth etc., because the retreating position of top more of the stroke when making shank 3 be positioned at than embroidery, so can guarantee the lower end of suture needle and the space of worktable upper surface biglyyer.
In the above-described embodiments, represented example by utilizing drive motor 16 to make screw mandrel 8 be rotated driving, moving member 18 is relatively pumped, but be not limited thereto, by make with drive motor 16 make moving member 18 be rotated driving the negative thread body structure and carry out the structure of lifting by the moving member (negative thread body) 18 that relative these rotations of screw mandrel 8 are driven, also can make with pumping of this screw mandrel 8 and linkedly shank 3 is back and forth driven.
In addition, make and on each sewing machine head H, have the drive motor 16 that makes shank 8 rotation respectively, but be not limited thereto, also can make the structure of utilizing single drive source that the screw mandrel 8 of all sewing machine head H is rotated.The jump device of the moving member 18 and the drive transmitting of shank 3 being removed usefulness can also be set again.
Again, in the above-described embodiments, thereby represented by constituting needle bar drive device, and be rotated the example that driving utilizes threaded function to make moving member 18 carry out lifting, but the structure of needle bar drive device of the present invention is not limited thereto with 16 pairs of screw mandrels 8 of motor by screw mandrel 8 with moving member 18 that screw mandrel 8 screws togather.Fig. 9 is another structure example of needle bar drive device of the present invention.In Fig. 9, the driving shaft 51 of the rotary driving motor that in support arm 50, is had, the axle that generally perpendicularly erects with the relative side of this support arm 50 is that the center is rotated.Drive rod 52, but be bearing on this driving shaft 51 with the swing of the end above-below direction thereafter earth's axis.At the leading section of drive rod 52, axle is supporting an end of connecting rod 53 freely to rotate.And the end the opposing party of this connecting rod 53 is connecting moving member 54 freely to rotate.Moving member 54 direction up and down is installed on the cramp bar 55 of the front face side (left side among the figure) that is erected at support arm 50 along the vertical direction with can move freely, and is connected with drive rod 52 by connecting rod 53.Front face side at this moving member 54 is formed with a pair of engaging tab 56 up and down, utilizes engagement pin 28 clampings of this engaging tab 56 with present selected shank.Thus, be rotated driving to positive and negative two directions by making motor, can make drive rod 52 with driving shaft 51 be the center up and down direction carry out wobble drive.Because moving member 54 is being connected with drive rod 52 by connecting rod 53, so can follow swing axially the moving back and forth up and down along cramp bar 55 of this drive rod 52.With the moving up and down interlock, just can make present selected shank 3 carry out lifting to drive of this moving member 54.
Figure 10 represents the another structure example of needle bar drive device.Among Figure 10, the rotating shaft 61 of rotary driving motor that is configured in the side top of support arm 60 is that the axle that generally perpendicularly erects with this side relatively is the axle that the center is rotated, and on this rotating shaft 61 drive pulley 62 is installed.From the downward assigned position in drive pulley 62 vertical ground, disposing the driven pulley 63 that rotates on the side that is bearing in support arm 60 freely again.On drive pulley 62 and driven pulley 63, volume is hung and be adapted to the transmission belt 64 of direction extension up and down in support arm 60.Fixing moving member 65 in the front (left side among the figure) of transmitting belt 64.Moving member 65 moves up and down on the cramp bar 66 that is installed in the front face side that is set up in support arm 60 along the vertical direction freely.And, setting a pair of engaging tab 67 of the engagement pin 28 of answering the clamping shank in the front face side of moving member 65.Thus, drive to positive and negative two directions rotation, can make to be fixed on moving member 54 axially the moving back and forth up and down of transmitting on the belt 64 along cramp bar 66 by making motor.Therefore, in such structure, also can with the stroke that moves up and down linkedly, makes selected shank 3 to carry out lifting of this moving member 65.
Above-mentioned Fig. 9 and needle bar drive device shown in Figure 10 are in and make shank 3 lay respectively at the state of retreating position.In Fig. 9 and structure shown in Figure 10, suitably control by action, when embroidery, can make shank 3 carry out lifting, again with the minimal stroke of necessity to drive motor, can freely set, change the driving timing of shank, when the operation of replacement of carrying out cloth etc., can keep out of the way to retreating position.In addition, drive special-purpose drive motor, be not limited to turning motor, also can use linear motor as shank.

Claims (5)

1, a kind of sewing machine needle bar drive unit is characterized in that having:
Sewing machine needle bar is carried out the special-purpose drive source that lifting drives usefulness;
Make the action of when action with this drive source be controlled to make described shank in the prescribed stroke scope, carry out elevating movement, action with this drive source when not making action is controlled to the control device that makes described shank move to the retreating position of regulation, described retreating position is set at the top of the top dead-centre of described prescribed stroke scope.
2, sewing machine needle bar drive unit as claimed in claim 1 is characterized in that,
Described control device can also change the time diagram of the elevating movement of the described shank in described prescribed stroke scope.
3, sewing machine needle bar drive unit as claimed in claim 1 is characterized in that,
The position of the described top dead-centre by setting described prescribed stroke scope changeably, and can be according to thickness change the trip scope of sewn object.
4, as each described sewing machine needle bar drive unit in the claim 1~3, it is characterized in that,
Described drive source is a rotary-type motor, passes on mechanism by be in line reciprocating motion of the rotation transformation with this drive source, described shank is carried out lifting drive.
5, as each described sewing machine needle bar drive unit in the claim 1~4, it is characterized in that,
Be provided with a plurality of sewing machine heads on described Sewing machines, described drive source is separately positioned on each sewing machine head.
CNA200480023575XA 2003-10-27 2004-10-27 Needle bar driving device of sewing machine Pending CN1836066A (en)

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JP2003366097A JP2007006912A (en) 2003-10-27 2003-10-27 Needle bar driving device for sewing machine
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PCT/JP2004/015915 WO2005040479A1 (en) 2003-10-27 2004-10-27 Needle bar driving device of sewing machine

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EP (1) EP1679397A1 (en)
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KR (1) KR100750022B1 (en)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275349B (en) * 2007-03-28 2012-02-01 飞亚集团有限公司 Looper driving mechanism for multi-head coiling embroidery computer controlled embroidery machine
CN106906582A (en) * 2016-11-07 2017-06-30 浙江越隆缝制设备有限公司 Reduction stops the embroidery machine color changing box of pin error
CN109423780A (en) * 2017-08-31 2019-03-05 兄弟工业株式会社 Apparatus for sewing

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007301299A (en) 2006-05-15 2007-11-22 Tokai Ind Sewing Mach Co Ltd Multi-head embroidery machine
DE102006045229A1 (en) * 2006-09-26 2008-04-03 Schaeffler Kg Stick head
CN105492040B (en) * 2013-09-05 2019-06-07 赛诺菲-安万特德国有限公司 Band triggers the needle insertion of the driving mechanism of load on spring manually and retracts sub-assembly
US11105030B1 (en) * 2015-07-20 2021-08-31 James Buck Break away needle bar stud
CN107237060A (en) * 2017-07-28 2017-10-10 台州市叶氏绣花机制造有限公司 A kind of sewing machine
CN108796851A (en) * 2018-07-23 2018-11-13 上海安围智能科技股份有限公司 A kind of sewing host of mineral cotton machine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492959A (en) * 1967-11-25 1970-02-03 Pfaff Ag G M Means for adjusting driving components of sewing machines
GB1417130A (en) * 1972-12-30 1975-12-10 Singer Co Tufting machines
JPS6088584A (en) * 1983-10-20 1985-05-18 東海工業ミシン株式会社 Embroidering machine
IT1185580B (en) * 1985-05-27 1987-11-12 Rockwell Rimoldi Spa NEEDLE STROKE CONTROL DEVICE OF A SEWING MACHINE
JP3037960B2 (en) 1990-04-24 2000-05-08 株式会社アルファ Remote control master key device
JPH04347192A (en) * 1991-05-23 1992-12-02 Tokai Ind Sewing Mach Co Ltd Embroidering machine
DE4118178C1 (en) * 1991-06-03 1992-06-17 G.M. Pfaff Ag, 6750 Kaiserslautern, De Sewing machine - has drive unit for needle rod and an adjusting unit for altering needle rod lift
CH691389A5 (en) * 1994-12-14 2001-07-13 Gateway Textiles Ltd Needle drive for a multi-needle quilting machine.
US5797337A (en) * 1996-04-08 1998-08-25 Amf Reece, Inc. Needle bar drive for a buttonhole sewing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275349B (en) * 2007-03-28 2012-02-01 飞亚集团有限公司 Looper driving mechanism for multi-head coiling embroidery computer controlled embroidery machine
CN106906582A (en) * 2016-11-07 2017-06-30 浙江越隆缝制设备有限公司 Reduction stops the embroidery machine color changing box of pin error
CN109423780A (en) * 2017-08-31 2019-03-05 兄弟工业株式会社 Apparatus for sewing
CN109423780B (en) * 2017-08-31 2021-07-20 兄弟工业株式会社 Sewing device

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WO2005040479A1 (en) 2005-05-06
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JP2007006912A (en) 2007-01-18
US7322303B2 (en) 2008-01-29
EP1679397A1 (en) 2006-07-12

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